Product Instruction Manual
Page 3
... 29 Starting / Stopping the Engine 30 Operating Instructions 34 Oil Quantity Control 35 Taking Care of your STIHL chain saw, it is to -time. STIHL's philosophy is important that you can be made from time-to continually improve all of personal injury....Maintaining and Sharpening the Saw Chain 44 Maintenance and Care 47 { Main Parts Specifications Special Accessories Ordering Spare Parts Maintenance and Repairs STIHL Incorporated Federal Emission Control Warranty Statement Trademarks MS 311, MS 391 English 49 Allow only persons who fully understand 51 this manual. ...
... 29 Starting / Stopping the Engine 30 Operating Instructions 34 Oil Quantity Control 35 Taking Care of your STIHL chain saw, it is to -time. STIHL's philosophy is important that you can be made from time-to continually improve all of personal injury....Maintaining and Sharpening the Saw Chain 44 Maintenance and Care 47 { Main Parts Specifications Special Accessories Ordering Spare Parts Maintenance and Repairs STIHL Incorporated Federal Emission Control Warranty Statement Trademarks MS 311, MS 391 English 49 Allow only persons who fully understand 51 this manual. ...
Product Instruction Manual
Page 5
...to use of a power tool (or other purposes, since misuse may result in loss of this machine. Keep the AV system well maintained. Keep the MS 311, MS 391 3 At full throttle, the chain speed can be hazardous.The saw . Use your doctor before operating this machine may be strenuous. Warning! Minors...it is in use of a chain saw involves 1 the operator 2 the saw only for a description of the controls and the function of the parts of all STIHL chain saws. Do not lend or rent your hands warm. Most of these safety precautions and warnings apply to the operator's hands. See the...
...to use of a power tool (or other purposes, since misuse may result in loss of this machine. Keep the AV system well maintained. Keep the MS 311, MS 391 3 At full throttle, the chain speed can be hazardous.The saw . Use your doctor before operating this machine may be strenuous. Warning! Minors...it is in use of a chain saw involves 1 the operator 2 the saw only for a description of the controls and the function of the parts of all STIHL chain saws. Do not lend or rent your hands warm. Most of these safety precautions and warnings apply to the operator's hands. See the...
Product Instruction Manual
Page 6
...of the above -mentioned precautions do not squeeze the handles with ANSI Z 87.1 (or your ability to your face STIHL recommends that could become caught on "Main Parts and Controls." Proper Clothing Warning! To reduce the risk of their hearing checked regularly. Secure hair so it is ... Take frequent breaks. If any way. This field may damage your head. To reduce the risk of cut injuries, wear pants or chaps that MS 311, MS 391 To reduce the risk of injury to hear warnings (shouts, alarms, etc.) is restricted. Avoid loose-fitting jackets, scarfs, neckties, jewelry,...
...of the above -mentioned precautions do not squeeze the handles with ANSI Z 87.1 (or your ability to your face STIHL recommends that could become caught on "Main Parts and Controls." Proper Clothing Warning! To reduce the risk of their hearing checked regularly. Secure hair so it is ... Take frequent breaks. If any way. This field may damage your head. To reduce the risk of cut injuries, wear pants or chaps that MS 311, MS 391 To reduce the risk of injury to hear warnings (shouts, alarms, etc.) is restricted. Avoid loose-fitting jackets, scarfs, neckties, jewelry,...
Product Instruction Manual
Page 10
...snow) and in this position, you can best oppose and absorb the push, pull and kickback forces of injury from falling limbs or branches. 8 MS 311, MS 391 Put off the work on reactive forces). To reduce the risk of your saw in confined spaces, one hand. Warning! With your body. ...Even for those compact saws designed for use the saw with your hand or any other part of control, never work when the weather is windy, stormy or rainfall is dangerous because the operator may lose control. Be extremely cautious when...
...snow) and in this position, you can best oppose and absorb the push, pull and kickback forces of injury from falling limbs or branches. 8 MS 311, MS 391 Put off the work on reactive forces). To reduce the risk of your saw in confined spaces, one hand. Warning! With your body. ...Even for those compact saws designed for use the saw with your hand or any other part of control, never work when the weather is windy, stormy or rainfall is dangerous because the operator may lose control. Be extremely cautious when...
Product Instruction Manual
Page 12
...damage the cutting attachment or AV system. Operating instructions Warning! The saw is idling. Antivibration elements should be replaced, consult your STIHL servicing dealer only. 10 MS 311, MS 391 Your saw chain continues to move the slide control / stop the engine before putting a chain saw down sitting on ..., branches or leaves. Warning! Never modify your employer or a local OSHA representative. If you do not touch the muffler and other parts of the engine speed. To reduce risk of burns do not have any questions as you have control of the engine (e.g. clutch, ...
...damage the cutting attachment or AV system. Operating instructions Warning! The saw is idling. Antivibration elements should be replaced, consult your STIHL servicing dealer only. 10 MS 311, MS 391 Your saw chain continues to move the slide control / stop the engine before putting a chain saw down sitting on ..., branches or leaves. Warning! Never modify your employer or a local OSHA representative. If you do not touch the muffler and other parts of the engine speed. To reduce risk of burns do not have any questions as you have control of the engine (e.g. clutch, ...
Product Instruction Manual
Page 15
... handle and makes a sufficiently forceful contact with the operator. No Quickstop or other parts of your instruction manual. Other chains are designed to ensure that the chain is ...guard. In addition, removal of the hand guard on a saw chain and reduced kickback bars STIHL offers a variety of your instruction manual entitled "Chain Brake" and the section "Maintenance, Repair..."Important Adjustments"). Low kickback saw equipped with the operation of ANSI B 175.1-2000 MS 311, MS 391 13 Cutting attachments with the computed kickback angle requirements of the chain brake. ...
... handle and makes a sufficiently forceful contact with the operator. No Quickstop or other parts of your instruction manual. Other chains are designed to ensure that the chain is ...guard. In addition, removal of the hand guard on a saw chain and reduced kickback bars STIHL offers a variety of your instruction manual entitled "Chain Brake" and the section "Maintenance, Repair..."Important Adjustments"). Low kickback saw equipped with the operation of ANSI B 175.1-2000 MS 311, MS 391 13 Cutting attachments with the computed kickback angle requirements of the chain brake. ...
Product Instruction Manual
Page 21
... dangerous because they involve the use of either the sectioning felling cut or plunge-cut method. Sectioning method For the sectioning method make the first part of the felling cut a large, wide felling notch. First, cut with the guide bar fanning in kickback. Felling a tree that has a diameter... do not cut in the kerf to open the cut. Then, using the bumper spike as the hinge. Make a plunge cut the hinge. MS 311, MS 391 19 Plunge-cut method Timber having a diameter more than necessary. When repositioning for the next cut, keep the guide bar fully engaged in ...
... dangerous because they involve the use of either the sectioning felling cut or plunge-cut method. Sectioning method For the sectioning method make the first part of the felling cut a large, wide felling notch. First, cut with the guide bar fanning in kickback. Felling a tree that has a diameter... do not cut in the kerf to open the cut. Then, using the bumper spike as the hinge. Make a plunge cut the hinge. MS 311, MS 391 19 Plunge-cut method Timber having a diameter more than necessary. When repositioning for the next cut, keep the guide bar fully engaged in ...
Product Instruction Manual
Page 22
... keep to reduce the risk of personal injury, never stand directly behind the tree when it is cutting a log into sections. 001BA033 KN 20 MS 311, MS 391 Warning! When the tree hangs or for falling limbs. Be extremely cautious and avoid contacting the log or other reason does not fall , ..., align the saw in the direction in which are inexperienced with the nose of the saw and severe or fatal injury to fall , since part of kickback at full throttle, insert the guide bar in the illustration. Begin the plunge cut , follow the sectioning method described previously. There is...
... keep to reduce the risk of personal injury, never stand directly behind the tree when it is cutting a log into sections. 001BA033 KN 20 MS 311, MS 391 Warning! When the tree hangs or for falling limbs. Be extremely cautious and avoid contacting the log or other reason does not fall , ..., align the saw in the direction in which are inexperienced with the nose of the saw and severe or fatal injury to fall , since part of kickback at full throttle, insert the guide bar in the illustration. Begin the plunge cut , follow the sectioning method described previously. There is...
Product Instruction Manual
Page 23
...the logs, limbs and roots are used to remove the flywheel or if an improper tool is used , STIHL may be caught and flung in the appropriate section of non-STIHL parts may be cut (2) at a time. When bucking, do not stand on top of a sawhorse. Cut... make sure that the cutting tool is extremely hazardous. MS 311, MS 391 21 Sharp slivers of wood may deny coverage. 001BA151 KN Warning! 2 Use only identical STIHL replacement parts for maintenance and repair. English maintained properly or if nonapproved replacement parts were 1 used to hold the flywheel in "blow down...
...the logs, limbs and roots are used to remove the flywheel or if an improper tool is used , STIHL may be caught and flung in the appropriate section of non-STIHL parts may be cut (2) at a time. When bucking, do not stand on top of a sawhorse. Cut... make sure that the cutting tool is extremely hazardous. MS 311, MS 391 21 Sharp slivers of wood may deny coverage. 001BA151 KN Warning! 2 Use only identical STIHL replacement parts for maintenance and repair. English maintained properly or if nonapproved replacement parts were 1 used to hold the flywheel in "blow down...
Product Instruction Manual
Page 31
...°F (+10 °C) 0001BA002 KN Before starting work: Run engine at the following intervals: Full-time usage: Part-time usage: Occasional usage: every 3 months every 6 months every 12 months 2 1 1 N Loosen screws ... operate only if it serviced and maintained regularly by trained personnel, such as your STIHL servicing dealer, at idle speed, engage the chain brake (push hand guard toward... Refit the shroud and tighten the screws Heated air is necessary to overheating 0001BA003 KN MS 311, MS 391 29 Chain brake maintenance Remove shroud N Move the Master Control lever to full ...
...°F (+10 °C) 0001BA002 KN Before starting work: Run engine at the following intervals: Full-time usage: Part-time usage: Occasional usage: every 3 months every 6 months every 12 months 2 1 1 N Loosen screws ... operate only if it serviced and maintained regularly by trained personnel, such as your STIHL servicing dealer, at idle speed, engage the chain brake (push hand guard toward... Refit the shroud and tighten the screws Heated air is necessary to overheating 0001BA003 KN MS 311, MS 391 29 Chain brake maintenance Remove shroud N Move the Master Control lever to full ...
Product Instruction Manual
Page 36
...in period, the frictional resistances in the shortblock are greater during this could damage the engine - Long-term storage See "Storing the machine" 34 MS 311, MS 391 The engine develops its maximum power after finishing work . this period. Open the throttle only when the chain brake is off the bar....of fuel in a dry place, well away from thermal overload. If it at operating temperature during the break-in period. As all moving parts have retensioned it is correct when the chain fits snugly against the underside of the bar but can damage the crankshaft and bearings. During ...
...in period, the frictional resistances in the shortblock are greater during this could damage the engine - Long-term storage See "Storing the machine" 34 MS 311, MS 391 The engine develops its maximum power after finishing work . this period. Open the throttle only when the chain brake is off the bar....of fuel in a dry place, well away from thermal overload. If it at operating temperature during the break-in period. As all moving parts have retensioned it is correct when the chain fits snugly against the underside of the bar but can damage the crankshaft and bearings. During ...
Product Instruction Manual
Page 38
...Remove air filter N Clean away loose dirt from the inside outwards. In case of stubborn dirt: N Wash the parts of different air filters. Do not clean fleece filters with compressed air from around the filter Do not use tools...damaged filter Cleaning the air filter N Knock out the filter or blow it clear with a brush! 36 MS 311, MS 391 the air filter could be adapted to the stop position 0 N Push the hand guard forwards -...The air filter system can be damaged in STIHL special-purpose cleaner (special accessories) or a clean, nonflammable cleaning liquid (e.g., warm soapy water) and dry ...
...Remove air filter N Clean away loose dirt from the inside outwards. In case of stubborn dirt: N Wash the parts of different air filters. Do not clean fleece filters with compressed air from around the filter Do not use tools...damaged filter Cleaning the air filter N Knock out the filter or blow it clear with a brush! 36 MS 311, MS 391 the air filter could be adapted to the stop position 0 N Push the hand guard forwards -...The air filter system can be damaged in STIHL special-purpose cleaner (special accessories) or a clean, nonflammable cleaning liquid (e.g., warm soapy water) and dry ...
Product Instruction Manual
Page 41
...oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. operating at idling speed, first check the spark plug. MS 311, MS 391 39 Fit a new spark plug after approx. 100 operating hours or earlier if...These factors cause deposits to form on the insulator nose which may result in trouble in operation. N Unfavorable running conditions (mostly at part throttle etc.) affect the condition of the approved range. These factors cause deposits to form on the insulator nose which may result in...
...oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. operating at idling speed, first check the spark plug. MS 311, MS 391 39 Fit a new spark plug after approx. 100 operating hours or earlier if...These factors cause deposits to form on the insulator nose which may result in trouble in operation. N Unfavorable running conditions (mostly at part throttle etc.) affect the condition of the approved range. These factors cause deposits to form on the insulator nose which may result in...
Product Instruction Manual
Page 46
... chain pitch - The angles must observe certain angles when resharpening the chain cutter. N Replace any damaged or worn parts of the original parts. Other files have your chain resharpened by a STIHL servicing dealer. A B A Filing angle B Side plate angle Chain type Rapid Micro (RM) Rapid Super (RS) Picco ...the angles are particularly wear resistant. N Check the chain for checking the filing and side plate angles, 001BA203 KN 689BA025 KN 44 MS 311, MS 391 and in particular if the depth gauge is a universal tool for cracks in the links and damaged rivets. You must be used...
... chain pitch - The angles must observe certain angles when resharpening the chain cutter. N Replace any damaged or worn parts of the original parts. Other files have your chain resharpened by a STIHL servicing dealer. A B A Filing angle B Side plate angle Chain type Rapid Micro (RM) Rapid Super (RS) Picco ...the angles are particularly wear resistant. N Check the chain for checking the filing and side plate angles, 001BA203 KN 689BA025 KN 44 MS 311, MS 391 and in particular if the depth gauge is a universal tool for cracks in the links and damaged rivets. You must be used...
Product Instruction Manual
Page 48
... a welloiled condition. but do not lower the highest point of the humped drive link (with service marking) is level with the filing gauge. The other parts of file holder with the depth gauge. Sharpening Tools (special accessories) Chain pitch Round file ^ Round file File holder inch 1/4 3/8 P 0.325 3/8 0.404 ... 0814 252 3356 0814 252 3356 0814 252 3356 0814 252 3356 0814 252 3356 Sharpening kit 1) Part No. 5605 007 1027 5605 007 1027 5605 007 1028 5605 007 1029 5605 007 1030 46 MS 311, MS 391 N Use a filing gauge to the stamped service marking (see arrow) - N Before a ...
... a welloiled condition. but do not lower the highest point of the humped drive link (with service marking) is level with the filing gauge. The other parts of file holder with the depth gauge. Sharpening Tools (special accessories) Chain pitch Round file ^ Round file File holder inch 1/4 3/8 P 0.325 3/8 0.404 ... 0814 252 3356 0814 252 3356 0814 252 3356 0814 252 3356 0814 252 3356 Sharpening kit 1) Part No. 5605 007 1027 5605 007 1027 5605 007 1028 5605 007 1029 5605 007 1030 46 MS 311, MS 391 N Use a filing gauge to the stamped service marking (see arrow) - N Before a ...
Product Instruction Manual
Page 51
Main Parts 3 5 2 4 # 1 6 11 7 12 8 10 9 13 16 17 15 18 20 22 19 23 21 14 24 English 1 Shroud Lock 2 Carburetor Adjusting Screws 3 Spark Plug Boot 4 Shutter (... Fuel Filler Cap 20 Master Control Lever 21 Throttle Trigger 22 Throttle Trigger Lockout 23 Rear Handle 24 Rear Hand Guard # Serial Number 4903BA003 KN MS 311, MS 391 49
Main Parts 3 5 2 4 # 1 6 11 7 12 8 10 9 13 16 17 15 18 20 22 19 23 21 14 24 English 1 Shroud Lock 2 Carburetor Adjusting Screws 3 Spark Plug Boot 4 Shutter (... Fuel Filler Cap 20 Master Control Lever 21 Throttle Trigger 22 Throttle Trigger Lockout 23 Rear Handle 24 Rear Hand Guard # Serial Number 4903BA003 KN MS 311, MS 391 49
Product Instruction Manual
Page 55
... only by the STIHL parts symbol K. Your emission control system includes parts such as the part numbers of the guide bar and saw model, the part numbers and names of sale, to conform with U.S. Other repair work is performed at the time of the parts. Where a warrantable condition exists, STIHL Incorporated will make reordering simpler. MS 311, MS 391 53...
... only by the STIHL parts symbol K. Your emission control system includes parts such as the part numbers of the guide bar and saw model, the part numbers and names of sale, to conform with U.S. Other repair work is performed at the time of the parts. Where a warrantable condition exists, STIHL Incorporated will make reordering simpler. MS 311, MS 391 53...
Product Instruction Manual
Page 56
... owner, shall not be completed in your warranty rights and responsibilities, please contact a STIHL customer service representative at the time of time up to STIHL. Any warranted part which cause the engine to fail to conform with applicable regulations for the period of sale... engine will begin on emission-related parts and must be designed, built and equipped, at 1-800-4678445 or you have any authorized STIHL servicing dealer or warranty station. Any warranted part which is defective. Diagnosis You, as required maintenance will be charged for 54 MS 311, MS 391
... owner, shall not be completed in your warranty rights and responsibilities, please contact a STIHL customer service representative at the time of time up to STIHL. Any warranted part which cause the engine to fail to conform with applicable regulations for the period of sale... engine will begin on emission-related parts and must be designed, built and equipped, at 1-800-4678445 or you have any authorized STIHL servicing dealer or warranty station. Any warranted part which is defective. Diagnosis You, as required maintenance will be charged for 54 MS 311, MS 391
Product Instruction Manual
Page 57
...477; Deviations from this manual are based on the application of the following list specifically defines the emission-related warranted parts: - Trademarks English STIHL Registered Trademarks STIHL® { K The color combination orange-grey (U.S. Spark Plug - Carburetor - The following : N repair or... or replacements not conforming to other engine components caused by STIHL Incorporated, and N replacement of parts and other services and adjustments necessary for Warranty Service Bring the product to any of the recommended 2-stroke fuel-oil MS 311, MS 391 55
...477; Deviations from this manual are based on the application of the following list specifically defines the emission-related warranted parts: - Trademarks English STIHL Registered Trademarks STIHL® { K The color combination orange-grey (U.S. Spark Plug - Carburetor - The following : N repair or... or replacements not conforming to other engine components caused by STIHL Incorporated, and N replacement of parts and other services and adjustments necessary for Warranty Service Bring the product to any of the recommended 2-stroke fuel-oil MS 311, MS 391 55
Parts Diagram
Page 20
... screw 1 Pump piston kit 3 E-clip 1 Choke shutter 2 Round head screw 1 Torsion spring 1 Choke shaft with lever 1 Throttle lever 1 Torsion spring 1 Throttle lever 1 Set of carburetor parts ☐ 6 - 9 (1) MS 311, (2) MS 311-Z, (3) MS 391, (4) MS 391-Z MS 311, MS 391 20 SCS 01-2010 3.29
... screw 1 Pump piston kit 3 E-clip 1 Choke shutter 2 Round head screw 1 Torsion spring 1 Choke shaft with lever 1 Throttle lever 1 Torsion spring 1 Throttle lever 1 Set of carburetor parts ☐ 6 - 9 (1) MS 311, (2) MS 311-Z, (3) MS 391, (4) MS 391-Z MS 311, MS 391 20 SCS 01-2010 3.29